import CryptoJS from 'crypto-js'
// 默认秘钥
let defaultKeyStr = 'abcdefgabcdefg12'
export default {
    // 随机生成指定数量的16进制key
    generatekey (num) {
        const library = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'
        let key = ''
        for (var i = 0; i < num; i++) {
            const randomPoz = Math.floor(Math.random() * library.length)
            key += library.substring(randomPoz, randomPoz + 1)
        }
        return key
    },
    // 修改默认秘钥
    modDefaultKeyStr (keyStr) {
        if (keyStr) {
            defaultKeyStr = keyStr
        }
    },
    // 加密
    encrypt (word, keyStr) {
        // 判断是否存在ksy，不存在就用定义好的key
        keyStr = keyStr || defaultKeyStr
        var key = CryptoJS.enc.Utf8.parse(keyStr)
        var srcs = CryptoJS.enc.Utf8.parse(word)
        var encrypted = CryptoJS.AES.encrypt(srcs, key, { mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7 })
        return encrypted.toString()
    },
    // 解密
    decrypt (word, keyStr) {
        keyStr = keyStr || defaultKeyStr
        var key = CryptoJS.enc.Utf8.parse(keyStr)
        var decrypt = CryptoJS.AES.decrypt(word, key, { mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7 })
        console.log(word, keyStr, decrypt)
        return CryptoJS.enc.Utf8.stringify(decrypt).toString()
    }

}
